If I might interject and offer a different opinion into the cause of volatility in the copper market? There isnt any bubbles popping right now just more blowing

You have hedgers and speculators in full control of where these prices go at the moment. Oh dont forget China's demand is drying up because their economy sucks just like ours does. Ill leave it to Loyd Blankfeins minions to explain: Regarding Copper
in our view the window for higher prices is shortening as time passes. As a result, we recommend producers consider medium-term hedging strategies into any further near-term price rallies. Indeed, we believe that an increasing consensus is building on a 2014 surplus, which is likely already resulting in a bearish shift in sentiment towards the medium-term copper outlook by many market participants. At the same time, markets such as zinc, which have improving medium-term supply/demand balances, from prices digging into the cost curve (rather than deteriorating medium-term supply/demand balances from prices trading above marginal output costs, as is the case in copper), are likely to benefit from improved sentiment over the medium term.
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